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Human Body & Health

Grade 2 · On-level practice · 8 questions · Version PG-3BC9C3-1SLX

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1.How do vaccines help?
2.What is the immune system's job?
3.What do kidneys remove from blood?
4.Why is a balanced diet useful?
5.What do muscles do?
6.Why do people need sleep?
7.Which system sends messages through nerves?
8.Which cells carry oxygen?

Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 9
  1. How do vaccines help?They prepare immunity to recognize a pathogen
  2. What is the immune system's job?Defend against harmful pathogens
  3. What do kidneys remove from blood?Wastes and extra water
  4. Why is a balanced diet useful?It supplies varied nutrients
  5. What do muscles do?They contract to move body parts
  6. Why do people need sleep?To help the body and brain recover
  7. Which system sends messages through nerves?The nervous system
  8. Which cells carry oxygen?Red blood cells

Worked example

Connect a structure to its function and explain how body systems work together.

Common mistake

Naming an organ without explaining its system role.

Helpful hint

Trace what enters, changes, and leaves the system.